121-4009 - Miller Smith Silverline 2-Stage Inert Gas Regulator CGA 580 0-60 PSI

Precision Control for Industrial and Laboratory Gases

The Miller Smith 121-40-09 Silverline Series General Purpose Two Stage Regulator is engineered for professionals who demand unwavering accuracy and durability in gas control systems. Designed to handle inert and non-corrosive gases such as Air, Nitrogen, CO2, and Argon, this regulator is a staple in laboratories, general plant facilities, and maintenance shops. Its primary advantage lies in its two-stage construction, which reduces cylinder pressure in two steps. This mechanical design ensures that the delivery pressure remains constant throughout the life of the cylinder, eliminating the need for frequent manual adjustments as the inlet pressure decays.

Robust Construction and Reliability

Built to withstand the rigors of industrial environments, the 121-40-09 features a rugged brass bar stock body. To further enhance longevity and resistance to environmental factors, the body, bonnet, and gauges are fully plated. This plating offers superior protection against corrosion and wear, making it a reliable choice for long-term deployment. At the heart of the regulator is Miller Smith's proprietary Sure-Seat technology. This filtered seat design prevents debris from entering the seating area, significantly extending the service life of the component and ensuring high gas stream purity—critical for sensitive laboratory applications.

Operational Specifications

This model is equipped with a CGA 580 inlet connection, making it compatible with standard inert gas cylinders. It supports a maximum inlet pressure of 3500 PSI and provides a precise delivery range of 0-60 PSI. The large 1-7/8 inch diaphragm allows for sensitive pressure adjustments, while the 2-1/2 inch single-scale gauges provide clear, easy-to-read metrics for both cylinder and delivery pressure. Additionally, the body is tapped for rear panel mounting, offering versatile installation options for fixed systems. Note that while this regulator excels in general purpose applications, it is equipped with a preset safety relief valve that vents to the atmosphere and is therefore suitable only for non-hazardous gases.